There are also other problems: while on acid once I came to a realisation that really changed how I experienced things later on. My realisation was that most of my perceptions of things were really "coloured" by a layer of society. For example, during that trip I found some husks of dead lobsters, that were sundried and quite rotten and gory. But during the trip they were this amazing structure of iridescent craziness on a dimpled hard and shiny shell, combined with dried out half rotted soft meat on the inside. I knew that I should keep the germs away from my mouth or cuts/wounds and I think I played and analysed it for a bit, being amazed by its structure, textures and colours. After that the trip got a bit stronger and the focus was on other things, however. Some hours after the trip I came by the same place that I had happenstanced the lobster husk. The same lobster was lying there. It was ugly and disgusting. I had washed my hands thoroughly after playing with it but really had an urge to wash my hands again.
I laughed at how my amazement of the dead lobster had felt so profound just hours earlier.
But. The next day after a nice rest I actually started to see that many things are actually very special and beautiful but our upbringing has destroyed the ability to experience this beauty. Society has teached us that rotten things are ugly. But that is just a layer on your perception. The materiality of things has their intention embedded in them and if their intention is of great beauty, then the materiality tends to be beautiful as well.
What I am trying to say is that first order dismissal of "deep insights" might not be warranted. You might have really had a deep insight, but you cannot correctly assess it because the setting has changed.
I did know a guy who claimed to have lived years of family life with a wife and kids once on DMT. I doubt it was actually years but it probably felt like it and it did fuck him up a bit. He had to mourn the loss of the perfect family life he'd gotten used to. He knew all of their names and favorite foods and sports and colors and what happened at school and first kiss and pregnancy announcement and wedding and stuff. Honestly kinda scared me. He just started reciting a whole life, and then he refused to talk about it again
The biggest thing that DMT taught me is that time is an illusion, created by our minds as part of the construct that allows us to exist and focus on survival. This is true for all life that experiences an internal chronology, but as humans we can only know how this applies to humans. Sorry, time travel hopefuls :)
DMT also taught me that our perception is our reality, and that we cannot actually perceive "objective" reality in any form. It helped me understand my mother, who we believe was suffering from Alzheimer's or dementia (she was never able to be diagnosed before physical health issues became the primary concern). She would tell me about these stories of traveling to write movies or novels. Prior to my DMT experience, I would respond like many would, "oh but you never left the bed! you've been here the whole time!" in the gentlest way possible. After my DMT experience, I would sit with her and ask her about them. She was never able to go into quite as deep detail as the person you are talking about, but from that point, I truly believed that, in her perception, in her reality, she did very much indeed travel to write movies and novels. Or at the very least, I believe that is how her brain interpreted what the DMT was presenting her.
I believe DMT is ultimately the "guide" for death. It doesn't cause or induce death, but our brains release it in response to death. And sometimes, like all biological machines, it happens at the wrong time. Sometimes before, and sometimes maybe the brain misses the signals and is unable to secrete DMT at the appropriate time, for whatever reason. I believe dementia is merely the early natural introduction of DMT into the brain. I guess I'll find out when I feel what it feels like if I end up suffering dementia.
There's a lot of "belief" here, sure. Some may even go so far as to call it "woo". But DMT gave me this profound understanding at a deeply visceral level. This even took some time to realize upon lengthy reflection on the experience and what it took me through, with surprisingly strong remnant memories of the visuals of being forced through a "time loop" where my eyes were sort of "dragged" along the very path I'd looked around the room in the early part of the trip. We do scientifically know our brain will sometimes "rewind" to fill in gaps in our vision (think of the classic example of looking at a clock with a second hand and the first second kind of seems to linger, that's our brain rewinding and lying to us about what we were seeing in that moment, using all available information once our eyes stabilize).
But. The next day after a nice rest I actually started to see that many things are actually very special and beautiful but our upbringing has destroyed the ability to experience this beauty. Society has teached us that rotten things are ugly. But that is just a layer on your perception. The materiality of things has their intention embedded in them and if their intention is of great beauty, then the materiality tends to be beautiful as well.
What I am trying to say is that first order dismissal of "deep insights" might not be warranted. You might have really had a deep insight, but you cannot correctly assess it because the setting has changed.